From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Vrabel <david.vrabel@citrix.com>
Subject: Re: [PATCH 1/2] xen: event channel arrays are
 xen_ulong_t and not unsigned long
Date: Fri, 15 Feb 2013 13:54:44 +0000
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To: Ian Campbell <ian.campbell@citrix.com>
Cc: "Keir (Xen.org)" <keir@xen.org>, Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Tim Deegan <tim@xen.org>, Jan Beulich <JBeulich@suse.com>, xen-devel@lists.xen.org
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On 14/02/13 14:19, Ian Campbell wrote:
> On ARM we want these to be the same size on 32- and 64-bit.
> 
> This is an ABI change on ARM. X86 does not change.

Does this actually work for all possible events?  In a 32-bit guest on a
64-bit hypervisor, does the __ffs() find set bits in the upper 32-bit
word of the pending selector?  I don't think so.

David